Impairment Loss (Details) (USD $)	12 Months Ended		3 Months Ended			12 Months Ended		12 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 ESCO business	Dec. 31, 2012 GES-Port Charlotte subsidiary	Dec. 31, 2011 GES-Port Charlotte subsidiary	Dec. 31, 2012 GES-Port Charlotte subsidiary	Sep. 30, 2012 GES-Port Charlotte subsidiary	Dec. 31, 2012 GES-Port Charlotte subsidiary Generating assets	Sep. 30, 2012 GES-Port Charlotte subsidiary Generating assets	Dec. 31, 2012 C&I reporting unit
Impairment Loss
Carrying amount of the intangible asset							$ 2,500,000
Fair value of intangible assets				0		0
Impairment loss on intangible assets				2,500,000						3,500,000
Carrying amount of assets	5,224,000	6,283,000							4,600,000
Fair value of assets								3,500,000
Asset impairment charges								1,100,000
Impairment loss	3,547,000		3,200,000			3,500,000
Implied fair value of the goodwill					923,000
Carrying value of the goodwill	6,009,000	6,009,000			6,700,000
Goodwill impairment loss	1,435,000	5,846,000	1,400,000		5,800,000
Carrying value of property, plant and equipment	193,000	452,000	0
Carrying value of intangible assets		$ 2,046,000	$ 0